Free testosterone is the part of testosterone not bound to proteins, which is available to your tissues.
- Normal range (adults)
- Men 9–30 pg/mL (31–104 pmol/L) · Women 0.1–3.6 pg/mL (0.35–12.5 pmol/L)
- Sample
- Blood
- Fasting
- Not usually needed
- Also called
- Testosterone Free, Bioavailable Testosterone
Free Testosterone normal range
| Group | pg/mLConventional units: US, South Asia | pmol/LSI units: UK, Europe, Australia, international |
|---|---|---|
| Men | 9–30 | 31–104 |
| Women | 0.1–3.6 | 0.35–12.5 |
Your report may use either unit system; labs in the Gulf often print both. Ranges also vary slightly between laboratories, so the range printed on your own report is the one to go by.
Why is the Free Testosterone test done?
It is useful when total testosterone is borderline or when SHBG is abnormal.
What does a high Free Testosterone level mean?
High free testosterone in women often points to PCOS; in men, to testosterone use.
Common causes
- PCOS
- Low SHBG due to overweight or insulin resistance
- Testosterone or steroid use
Diet and lifestyle tips
- Reduce sugar and refined carbohydrates
- Regular exercise and weight loss
What does a low Free Testosterone level mean?
Low free testosterone in men can cause low libido and energy, even with normal total testosterone.
Common causes
- High SHBG (ageing, overactive thyroid, liver disease)
- Obesity and diabetes
- Pituitary or testicular problems
Diet and lifestyle tips
- Weight loss, strength training and good sleep
When should you see a doctor?
Discuss results with your doctor alongside total testosterone and SHBG.
Last updated
This page is for general education and is not a diagnosis. Normal ranges differ between laboratories, so always compare your result with the reference range printed on your own report, and discuss abnormal results with your doctor.